Sheet-metal pipe coupling



Oct. 2, 1928.

M. RACHLiN SHEET METAL PIPE COUPLING 2 Sheets-Sheet 1 Q Filed Jan. 19, 192'? Oct.2,1928. w 1,686,254

M. RACHLIN SHEET METAL PIPE CQUIPLING Filed Jan. 19. 1927 QShets-Sheet 2 4 TTORNEY vented fromdisengagement, The'diflerence between the two constructions hereinabove described consists in that, while in the construction illustrated in Figs. lto 5, inclusive, relativerotary movement betw en the two pipe sections-is prevented, such relative rotary motion is possible in the constructions illustrated in Figs. 6 to 10, inclusi-ve, ofthedrawings,'unless the friction between the two pipe sections be great enough to prevent such movement. V 7

The construction illustrated in Figs. .11 and i "12 of the drawingsdiiters from the one de scribed in connection with Figs. 1 to.5, inelusive, only in that an elbow 28 1s ]o1ned with a plpe sectlon 29, one-of said elements being provided with sockets 1.7 of thetype above described and the other one with lugs 20., Otherwise the construction and opera- '20 tion ofthe elements are the same.

By the ternflpipe section, as used in the i. claim, is meant a straight pipe section ora curved pipe sect-ion, such as an elbow, or other d/Vhat I claim is: v

of January, A. D. 1927.

like fitting, it being obyious that the jointmay;

be used for connecting straight pipe sections,

curved pipe sections or straight and curved sheet-metal pipe sectionhaving one of its ends inserted into-the socketed end of sald first-mentioned pipe section, and a plurality of wedge-shaped lugs on the inserted end of 'saidsecon'd-inentionedpipe section corresponding in number to and being seated in said sockets, the free outer Wider ends of said:

swcdgedtoverthe inner ends sockets being of said lugs. v

Signed at New York, in the county of N ew'- York and State of New York, this 18th day MAX RACHLIN; 

